The radioactivedebris is produced when the core is exposed above the coolant water level and overheats.
当核心暴露于冷却水位以上并过热，那放射性碎片就会产生。
2
Towns near Fukushima have responded cautiously to plans to build temporary storage sites for massive quantities of radioactivedebris generated by the accident.
因为这次爆炸产生了大量的放射性碎片导致福岛周边的城镇计划建立一些临时安置点时非常的谨慎小心。
3
In 1978, a nuclear - powered Soviet satellite plunged through earth 's atmosphere and disintegrated, scattering radioactivedebris over parts of northern Canada.